I am a newbie here. I was just wondering if there is anything available on the market that provides both potentiometer (i.e., knob rotation values) and joystick functionalities (i.e., 360-degree angular values in x-y) into one product/component
Hello,
I'm not really sure what you exactly mean, but if I understand your question right, maybe the thing you need is an encoder. There are even some especially made to connect to arduinos. Here is a link to one, that are dirt cheap, if this one doesn't isn't what you want then do a search on ebay for encoders.
Google 3 axis joystick
What you want is available.
Hello again, I just found a 3 axis joystick on DX.com, they mentioned is't suitable for Arduino.
http://www.dx.com/p/diy-arduino-ps2-joystick-game-controller-module-black-red-140042#.WiYDIyHw82x
I did not see anything in the product description that said 3 axis.